Stone milling machine



p 31932- c. A. COLGREN I 1,817,269

STONE MILLING MACHINE Filed Jan. 1'7, 1929 5 Sheets-Sheet 1 J59 @(M w 277 47750 Sept. 13, 1932. c. A. COLGREN STONE MILLING MACHINE 5 Sheets-Sheet 2 Filed Jan. 17, 1929 i-F 1932- c. A. COLGREN 1,877,269

STONE MILLING MACHINE Filed Jan. 17, 1929 5 Sheets-Sheet 3 5 She ts-Sheet 4 a o o o o o o c e o o .o a

ciooueee aneoba I JX/l/E/VTUR CPHRLEJ A @La/ E/v, 5y QM, @O'X 2% P 13, 1932- c. A. COLGREN 77, 69

STONE MILLING MACHINE Filed Jan, 17, 1929 5 Sheets-Sheet 5 NI/E/VTG/FJ 01/2 7150 fl Q1, 6mm,

y. W I

Patented Sept. 13, 1932 CHARLES ooLGREN, or :snooiyrineroiv; Inmaim' f V i STONE MILLING MACHINE,

Application filed January '17, 1929; Serial No. 333,098.

., My invention relates in general to stone milling machines, and has more particular reference to a novel means for and method ofmilling stone.

An tion isto provide a novelstone milling machine of rugged construction and capable of taking an unusually heavy cut for roughening the stone to size and being controllable to take alight cut for finishing purposes.

Another important object of my invention is to provide a stone milling machine capable of performing the milling operations simultaneously upon several faces of the stone.

Another important object of my invention is to provide a rotary stone milling cutter of novel construction capable of carrying a plurality of finishing tools whereby various configurations may be formed in aworklpiece with a minimum of manipulation.

Still another important object of invention is to provide a stone milling machine assembly arranged conveniently so that the time and, consequently the expense of per-.

forming milling operations upon stone may be materially reduced.

Among the other important objects of my invention. is to provide neatness, compactness and simplicity in a stone milling machine; to provide an easily operated'milling machine of im roved and enlar ed sco e'to rovide p b p l p 1 three rotary cutters 27, one ofwhich, 33,1s

an improved and simplified method for mills ing stone; to reduce the cost of milling stone; and to improve the milled stone surfaces.

Numerous other objects and advantagesof the invention will be apparent as it is more fully understood from the following descrip 'tion, which, taken in connection with the accompanying drawings; discloses a preferred embodiment of the invention.

Referring to the drawings Figure 1 1s a top plan view of a stone milling machine embodying my lnvention v Figure 2 is'a vertlcal 'crosssectlon taken substantially alongthe line 22 in Figure 1';

-Figure 3 is a vertical cross section taken vsubstantially along the line 33 in F iga ure 1; f s l vliigure 4 is a vertical cross section taken important object of my present invena of rotary cutters 27 are quality and texture ofsubsanaa'u mg the line ra in l e oa i Figure 5 isa'perspective view of a rotary milling cutter forming" a partof the machine embodying invention; and i .Figure 6 is a vertical 'cross sectiontaken substantially along theiline 6+6 in Figure 5,

To illustrate'my' invention I haveshown V on the drawings a stone milling machine, the various elements of which aresupportedflom 6 r H A work support l3, comprisinga shiftable table upon which I a base orfmain frame 11.-

a work piece may befirmly' and securely III-OUII CBCl 'lS supported: in the frame '11 by v ways 17 infwhich the work ppqr y have reciprocal slidingrrnovement, the ways being mountedin the frame and providing a grooved channel l9fadapt'ed to receive an outwardly extending ribbed projection 21 formed tothe work support l3.

by any suitable source of power such n prime mover 35,1which in the vdrawings is; illustrated .as an electric motor, mountedin the frame 11 and connected'by atrain of 7 5 gears 25,;to the work support. A plurality upp rt d f pp 'e memfialv uppo tf am 2 whi n t rn-are movably mounted to the ain frame or base 11 on support members3l; w

In theillustrated embodiment I have shown arranged to rotate about a horizontal axis and V to .operate upona horizontal surfaceof the work piece, while the remaining cutters, 41,. 8

whereby these cutters may operate upon .re-' 1 mote surfaces bearingan angular relation j9 ship to the surface of the work piece. upon which the cutter33 operates, so thatlwhenthe work piece 15. is advanced to the cutters,

and angularlyjdisposed faces piecemay be operated- -upon I simultaneously ,by the, cutters The cutters 1 may wp mt' y any s it ou ces o 1 i 5 several remote of the work power,lwhich in the illustrated embodiment comprisea: plurality of prime movers, specifi- Y Cally elect i mo tra- 5, wh c a e mqunt 599- 7' p The work upport m y b reciprocated i h ay 17 I tr uprights "51which are mounted to the base in the case of the cutter 33, consists sides of the work support 29 which consists V of in the supplemental support frames 29 and connected to the cutters by suitable driving means which inthe illustrated embodiment,

ofsprockets 37 mounted respectively on the drive shaft of the cutter 33 and the shaft of its driving motor, and chain 39 travelling around the sprockets t'o'furnish driving connection therebetween/ In the case of the lateral or angularly disposed cuttersll, the driving connec-. tion comprises a cooperating pair'o'f beveled gears 43, one, of which shaft of a prime mover which is mounted to a.

The horizontalcutter 33 and its driving motor35 are supported in a movable frame an upper frame-work the motor 135 is carried and a 4:7 1 carrying the cutter.

45 in which, 7 lower frame-work These frames 45 andA7 are mounted for transverse or lateral movement'with respect or base'll and the support slidably mounted in upper '11. and extend upwardly thereof on opposite 7 13. The frames 45 and 4:7 are slidably mounted tov the members49 and means is provided for shifting 6 the frames 45 and 4:7"

simultaneously and to' gether with respect to the memberst9'. These means comprise threaded shafts 53 6Xt6nding through and having engagement with internal threaded fittings 55 mounted to the I frames. "The threaded. rods 53*are journaled r at their extremities in bearings 57 which are mounted to the'lat'erally extendingmembers v rying sprockets 61.

49 'r and which'have proj eating ends 59 car'- i The sprockets (SI-are interconnected driving chains 63 where'- by, epoa rotationof onejshaft53, all the shafts may be Y synchronously rotated. One

of the shafts 53 is extended as at 65 for con- V 'nection with anysuitable source of" driving 5- the "lateral cutters-4C1; 1 1 I able controllable means Means is also provided I for movingpower (not shown) which may of course be a hand wheel, an electricmotor," or any suit;-

shaftsf *It will be obvious that,- by rotating the end 65 0f a shaft*53, all of the shafts will berotated in the fittings and will cause the frames 47and45 to shiftrelatively and g to any desired relative position ab'ove the work piece15'. A similar of course, be provided for cutter 33 toward andaway from the work piece 15 whereby the depth of the cut; taken in thework piece' by the cutter :may be ad- 0 i tending"threaded rods 67 rotatably mounted justed'. "These means include vertically ex- 7 to theivertical'uprights 51, being journaled toFthe uprights.

at their ektremities in bearings 69,; mounted V g Y The rods 67 extendijupwardly ofthe upper bearings 69 and carry mounted to the uprights is mounted to; a drive 35 and the other of driven shaft of-a cutter. V

103 beyond the bearing 99 to provide a for turning the of course, may

beset-to take" a cut of desired thickness in "the work-piece:v

beveled drive gears 71. The rods also are threaded. through internally threaded fittings 7 3 which are mounted to the members 49 whereby, upon rotation of the threaded rods 67, the members 49 may be raised or lowered relatively tothe uprights 51. The rods 67 are rotated shafts 75 provided with beveled gears having driving engagement with the gears 71 and'which are journaled in bearings 77 shaftcarries a sprocket 7 9 and a chain drive 81 passes aroundthese sprockets to provide .a' drivingjconnection." between the counter shafts. One of the counter shafts is extended' asat 83 and connected to any suitable.

by means of counter 51. Each counter source of driving power (not'shownf which i V of course may be a handle or an electric nio tor or anysuitable controllable me'ansifor rotatingthecounter; shaft. 1

The lateral cutters-itlmay be supported in any convenient manner'providingfor their movement to and from the work piece and I have shown one of the lateral cutters Tat 105 mounted for rotation in a shif table car'- riage' 85 which is 'slidably mounted inaway 87. 'Theway 87 is carriedin a support 89 extending'upwardly of the hase 'll. The carriage 85is'provid'ed with a vertical'bearing 91 in which the upper end-ofthe-cutter shaft is journaled' and has a bracket 93eX- tending therefrom and'provided with a bear ing 95in which the lower end-of the cutter shaft? is journaled.

provides means for supporting the prime The carriage- 85 "also i mover 35 which may be arranged thereon in any suitable of convenient manner. 'The way.

87is' arrangedtoguide the carriage to and from'the work piece l5 and means is pro vided for so moving the carriage. The carshaft 97 which is journaled at 99 in the pedestal 89 and which has a threaded end connecting with'a threaded fitting 101 mounted such as an electric motor able .me'ans for rotating. the shaft.

be apparent that by rotating theshaft in one direction the carriage 85" will be projected toward the Work piece th be arranged in position to'operate upon the 15 andthecutter ma v ll 20 work piece and by rotatingthesha'ft 97 in the reverse direction, drawn from the work piece;

the cutter niay-ibe-with- A 'By regulatingthe rotationof the shaft"97,xthe cutter. may

\ The other lateral eater/r shown;

:107. This cutter is carried. at the end Sofia naled in a bearing 109 formed in a framelll.

r 105' riage moving means ln'cludes a threaded The frame 111 is slidably mounted to a frame 115 extending between uprights 113, which in turn are mounted to and extend upwardly of the base 11, the frame 115 being also slidably mounted to the uprights 113. Means is provided for moving the frame 113 in the frame 115. This means comprises a pair of rods 117 j ournaled at its extremities in bearings 119 mounted to the frame 115. These rods are threaded through internally threaded fittings 121 mounted to the support frame 111 so that upon rotation of the rods 117, the frame 111 may be moved along the frame 115. The rods 117 are provided with sprockets 123 and a chain 125 provides driving engagement between these sprockets so that upon rotation of one rod 117, the other rod will rotate in synchronism. One of the rods is extended as at 127 for engagement with a suitable driving means .(not shown), which of course may be an electric motor. Means is provided for raising and lowering the frame 115 in order to the cutter. This is accomplished by threaded rods 129 which are journaled at their extremities in bearings, 131 mounted to the uprights 113. These rods make threaded engagement through a fitting 133 mounted to the frame 115 so-that upon rotation of the rods 129, the frame will be raised and lowered with respect to the side supports 113. The upper ends of the rods 129 are extended upwardly of the upper bearings 131 and are provided with sprockets 135 which are interconnected by a drive chain 137 whereby the rods .129 rotate synchronously when one is driven. One of the rods 129 is extended as at 139 to connect with a suitable source of driving power (not shown) which of course may be an electric motor.

It willbe apparent that by means of the apparatus hereinbefore described that the cutters may be moved toward the work piece 15 in order to take a cut of any desired depth therein. In operation, the motor 23 is driven to move the work support 13 and the work piece 15 past the cutters in a direction illustrated by the 'arrowsin Figures 1 and 2. It will be apparent that the speed at which the work piece 15 is fed past the cutters may be determined by suitably regulating the speed of rotation of the motor 23 which may be accomplished by suitable well known control means. It will also be apparent that the speed of rotation of the motors 35 may be controlled by similar control means, and that the positions ofthe several cutters relative to the 'work piece may be adjusted automatically, by suitably controlling the means for rotating the threaded rods 53, 67, 97, 117 and 129, all of which may be accomplished by providing suitable interlocked electrical remote control apparatus for the several driving means attached to the threaded shafts. In this way the opport throughout the my a p r t s,

adjust the altitude of g to seat.

sides thereof 50f the draw ngs. c 7 I 7' The holder. 141 is" arranged to carry straight edged milling .milling cutters tothe work or this purpose I form in the" holder 141' tangentially extending slots 153 adapted'to.

.tially extending tion;161, having eration of the various=parts of the device m y be yn m i d and the appa a us made relatively automatic and control lable. from may becompletely finished in one operation, the work piece remaining in the work supmilling. This is possible for the reason thatthe cutters may be quickly and easily adjusted to take athin cut. in the work piece after the preliminary roughing out has been takenr By means of the resetting of the cutters 3 single station, to the end that a workpiece 70 for the finishing cut: maybe accomplished time.

in a minimum Tine, cutters 27' may of course be of any 3.

desired type, but I prefer to use cutters substantially as .shown in Figuresfi and16 of the drawings.,These cutters comprise a holder 141 mounted to a cutter shaft 143.

In'the illustrated. embodiment, the'holder 141 comprises a rectangular. block and is provided ;with a plurality of radially extending slots 145 in which knives 147 are adapted These knives. are retained inpositionyin the slots 145 by means of set screws 149 extending from. a remote face ofthe holder and. entering the slots at points in the whereby the. tips of the set screws. 149 may gripthe cutter blades 147 and clamp the same againstthe opposite face of the slots. intheradially extending slots 145, have cutstone moulding, as

i cutters. I find it is advantageous. to present the straight edged piece at an angle.

receive a holder; for a straight. edged milling cutter blade 157 Each holder 155 has a butt, 15,9; adapted to seat in aitangengroove. and an outerporwork piece. A nother advantage is that the moulding cutter blades and straight edged a i The cutter blades 147, mounted '3 ting edges 151 of a formation adapted torcu t 1 shown clearly in Figure" 19 1 V i meansv '163for securing a i'cut-ter blade 157 thereto'and offset as at be noted that with this blades may be quickly and easily removed so that the straight edged cutter blades may operate alone upon the rangement of ,the

, vention or sacrificing any lholder in sets, each set ated straight edge blade extending sub- I scribed my cutter blades maybe used simultaneously, the cutting edges of both blades lying in subv stantially the same radial plane. A still further advantage resides in the ease with which the various blades may be removed or adjustedin order to compensate for wear.

' It is thought that the invention and numerous of its attendant advantageswill be understood from the foregoing description and it is'obvious that numerous changes may be made in the form, construction and arandscope of the inparting from the spirit of its attendant advantages, the form hereinbefore described being of a preferredembodiment only; y Having thus I claim asnew and desire to secure byLetters Patent is: v v r V V 1. A stonesmillin'g machine comprising described by invention, what a rotatable holder, the holder in sets, each set elongated straight edged blade extending substantially tangentially of the holder with its cutting edge pointmg in the direction of blades extending from rotation of the holder and a blade of substantially lesser width and having a configuratedj cutting edge V the holder in front of the cutting edge of the elongated blade'and projecting outward 1y beyond said edge whereby the elongated blade will cut a flat surface and the configurate'd blade will undercut the flat surface. -35

a 2. A stone milling machine 'comprisin'ga rotatable holder,

'stantially tangentially of the holder with its cutting edge pointing in, the direction of rotation of the holder and a blade of substantially lesser width and having a configuratedcutting edge extending radially of the holder in front and closely adjacent said edge and projecting outwardly beyond saidedge whereby'the elongated blade will cut a flat surface and the configurated blade will 'un "dercut the flat surface.

In witness whereof, I have hereunto subname. s j CHARLES A. COLGREN.

ief:

various parts without decompr sing an extending radially of blades extending from the '7 comprising an'elon- 

